---
title: "CVE-2026-44598\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-44598?format=md
keywords: index, follow
---

# CVE-2026-44598

Publication date 25 May 2026

Last updated 6 June 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**5.4 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2026-44598?format=md#impact-score)

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## Description

With valid login credentials, URL Redirection to Untrusted Site ('Open
Redirect'), Server-Side Request Forgery (SSRF) vulnerability in Apache
Shiro.
This issue affects Apache Shiro from 2.0-alpha to 2.1.0, and
3.0.0-alpha-1, only when using shiro-jakarta-ee integration module.
Users are recommended to upgrade to version 2.1.1, or 3.0.0-alpha-2 or
later, which fixes the issue by encrypting the cookie.
After successful login, Jakarta EE integration module uses
shiroSavedRequest cookie to redirect to a particular web page after login.
This cookie was not validated, and can be forged to send a HTTP GET request
from the server itself to an arbitrary URL from the cookie.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| shiro | 26.04 LTS resolute | Needs evaluation |
| 25.10 questing | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Needs evaluation |
| 22.04 LTS jammy | Needs evaluation |
| 20.04 LTS focal | Needs evaluation |
| 18.04 LTS bionic | Needs evaluation |
| 16.04 LTS xenial | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:

CVSS v4.0

[CVSS v4.0](https://ubuntu.com/security/CVE-2026-44598?format=md)
[CVSS v3.0](https://ubuntu.com/security/CVE-2026-44598?format=md)

**Base score**

5.1 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Attack requirements | None |
  | Privileges required | Low |
  | User interaction | Passive |
  | Vulnerable system - Confidentiality impact | Low |
  | Vulnerable system - Integrity impact | None |
  | Vulnerable system - Availability impact | None |
  | Subsequent system - Confidentiality impact | Low |
  | Subsequent system - Integrity impact | None |
  | Subsequent system - Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.1 · Medium |
  | Base + Threat score | - |
  | Base + Environmental score | - |
  | Base + Threat + Environmental score | - |

**Vector:** CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/S:N/AU:Y/R:A/V:D/RE:L/U:Green

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-44598)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-44598)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-44598)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-44598)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-44598>
* <https://www.openwall.com/lists/oss-security/2026/05/25/8>
* <https://shiro.apache.org/security-reports.html#cve_2026_44598>
* <http://www.openwall.com/lists/oss-security/2026/05/25/8>